Revolving ring-hearth oven



@@939006 L. HQNIGMANN. ET AL REVOLVING RING HEARTH OVEN Filed June 2, '1926 Y w f I'IBWIG HONIGIANN, 0F BAD TOLZ, AN D FRIEDRICH lParam OFFICE.

BARTLING, or MUNICH,

BIVQLVING RING-HEABTH OVEN.

appucaumnea rance, wie, serial no. 113,284, and 1n Germany June 2, 1925.

This inventionrelatesl to a revolving ring hearth oven in whichthe material for the purpose oit` being dried, subjected to dry dist1llation, degasification or other treatment, is read in the form of a thin layer lon. a revo ving ring hearth in order to be exposed to the eiect of heat during continuous working. More particularly the invention is concerned with revolving ring is hearth ovens of the type in which the revolvin hearth is carriedon annularlvar- L supports and rotated by driving means arranged onthe-said supports out# side of the oven. In such ovens a consideris abley diiiiculty arises in connection with the heath insulation of the heated oven chamber against the outer chambers, which iation 1s ny in order on the one hand to confine the oven heat, and on the 2@ other to protect the supporting and driving means from theeiect of heat of the oven. f a

Per se it is known for the pu se of inf sulation in revolving ring heart `*ovens to the considerable sa provide sand troughs into which dip ribs vertically arranged on the edge of the hearth. v

The object of the invention is an arran ement whereby on the one hand the heat 1nso sulation of the oven chamber against the --outside is improved, and on the other Land the maintenance of the su rting and drivin in a cool condition is facilitated. o 'this end inrevolving ring hearth ovens ,@5- having va gas closure, provision is made accordmg to this invention between the oven chamber and the supporting and driving means of the hearth and beyond the Igas closures such as sandtroughs arranged in M, proximity to thel edge of. the hearth, oi annnlar water cooled trou hs into which di 4amiular cooling ribs on t e revolving heart 1 or supporting means.

Particular diiiiculties are encountered 55 when such revolving hearths areto be heated 50 a mixture with the products fre uently con taining valuable and recovera le constituents is thereby avoided while the direct contact heating is nevertheless maintained.

ln order to overcome these -diiiiculties a 5t revolving ring hearth oven according to this v 2). The heating vhearth h which `consists of as a supporting ring, and is insulated from `the space containing the drivingmeans by r means of cooling water troughs and ribs oi? the supporting ring di ping therein. By this arrangement an vantageous heating of the ring hearth from below is rendered possible in spite of the fact that 'the supportingy and driving means are completely protected against the influence of the heat mit oreover by the articular arrangement the isolation of the eating chamber in reAn gard to the outiiow of heating gases is con siderably improved.

A constructional form of the invention is illustrated by way of examplevin the an nexed drawing in more or less diagrammati cal views.4 o

Fig.` 1 is a fragmentary sectional view ci the improved oven taken substantially on' the line 1`1 of Fig. 2, and l Fig. 2 is a plan view reduced scale.

The oven as shown is rovided with an from above on 'a ci:

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annular chamber a covere b the oven arching which may comprisean inner brick arch b and an up r flue c which is covered by insulating brick-work d with an interposed insulatin layer e.l Built into the lower por tion of tie oven arel two annular heating iiues f, f. which are traversed by heating gases in the direction ofthe arrows g admitted respectively by way of the inlet sockets A and B. i The heating lues f, f ex tend from the inlets A, B concentrically around and below the whole oven chamber to the outlet sockets A', B through which jfs-.w

latter the heating figases areled of (See Fig. ues are open towards the oven chamber and are brid ed by the ring eat conductin substances, such as metal. The ring hearth is rovided with downwardly depending ann ar ribs i which dip, respectively into sand troughs h, and k arranged in the walls of the heating ilues. The sand troughs lc close the heating iues against ,the oven chamber, while the sand troughs la are pro- `vided to close the 'same against a central space or annular channel Z located between t ein'. Accommodated in this space or chan- 5 nel is the upper part of the carrier ring m. This space 1s closed at the bottom by two troughs n, n which are charged with cooling water and into which dip annular ribs o depending from the carrier member m of the hearth. In this way the space Z is closed against the space located below the oven, and heat transmission through the carrier member m to the driving device p which is located below the oven, is completely avoided.

1. In a revolving ring hearth oven, a body having an annular oven chamber and spaced concentric heating lues communicating therewith, a space between said ues forming an annular channel, a revolving hearth supported in said chamber above sai flues, a supporting member for the hearthdepending therefrom into and through said `channel, drivin means for rotatin said supporting mem er located belowl sai channel, troughs at the lower end of said 'channel for containing a cooling medium, said sup porting member havin portions projecting` into said troughs to re uce the transmission of heat from said hearth to said driving means, inner and outer troughs extending about the upper ends of said heating lues beneath said hearth, and ribs formed on said hearth and depending into said inner and outer troughs. 2. In a revolving ring hearth oven, a body having an annular oven chamber and spaced concentric heatin flues therewith, a revolvlng ring hearth supporte in said chamber above sind ues, a support- A ing member for the hearth depending therefrom between said iues, driving means for rotating` said supporting member, inner and outer troughs extendn about the upper 45 ends of said heating lueseneath said hearth, i and ribs formed on said hearth and dependin into said inner and outer troughs.

n testimony whereof .we'have signed our names to this s ecication,

`, L WIGHONIGMANN.

FRIEDRICH BARTLING.

communicating 

